<?php

class TodoController extends Controller {

    /**
     * @var string the default layout for the views.
     */
    public $layout = '//layouts/preview';

    /**
     * @return array action filters
     */
    public function filters() {
        return array(
            'accessControl', // perform access control for CRUD operations
        );
    }

    /**
     * Specifies the access control rules.
     * This method is used by the 'accessControl' filter.
     * @return array access control rules
     */
    public function accessRules() {
        return array(
            array('allow', // allow authenticated users to perform all actions
                'actions' => array('index', 'view', 'meta', 'create', 'update', 'delete', 'manage', 'markAsDone', 'viewCalendar', 'jsonData'),
                'users' => array('@'),
            ),
            array('deny', // deny all users
                'users' => array('*'),
            ),
        );
    }

    /**
     * Displays a particular model.
     * @param integer $id the ID of the model to be displayed
     */
    public function actionView($id) {
        $this->render('view', array(
            'model' => $this->loadModel($id),
        ));
    }

    /**
     * Creates a new model.
     * If creation is successful, the browser will be redirected to the 'view' page.
     */
    public function actionCreate() {
        $model = new Todo;

        // Uncomment the following line if AJAX validation is needed
        // $this->performAjaxValidation($model);

        $transaction = $model->dbConnection->beginTransaction();

        if (isset($_POST['Todo'])) {
            try
            {
                $model->attributes = $_POST['Todo'];
                if ($model->save()) {
                    $transaction->commit();
                    $indexLink = CHtml::link('here', CController::createUrl('todo/index'));
                    Yii::app()->user->setFlash('create-todo-success', "Your to-do has been added. Click $indexLink to go back.");
                    $this->refresh();
                }
            }
            catch (Exception $e)
            {
                $transaction->rollBack();
            }
        }

        $this->render('create', array(
            'model' => $model,
        ));
    }

    /**
     * Updates a particular model.
     * If update is successful, the browser will be redirected to the 'view' page.
     * @param integer $id the ID of the model to be updated
     */
    public function actionUpdate($id) {
        $model = $this->loadModel($id);

        // Uncomment the following line if AJAX validation is needed
        // $this->performAjaxValidation($model);

        $transaction = $model->dbConnection->beginTransaction();

        if (isset($_POST['Todo'])) {
            try
            {
                $model->attributes = $_POST['Todo'];
                if ($model->save()) {
                    $transaction->commit();
                    $indexLink = CHtml::link('here', CController::createUrl('todo/index'));
                    Yii::app()->user->setFlash('update-todo-success', "Your to-do has been updated. Click $indexLink to go back.");
                    $this->refresh();
                }
            }
            catch (Exception $e)
            {
                $transaction->rollBack();
            }
        }

        $this->render('update', array(
            'model' => $model,
        ));
    }

    /**
     * Deletes a particular model.
     * If deletion is successful, the browser will be redirected to the 'index' page.
     * @param integer $id the ID of the model to be deleted
     */
    public function actionDelete($id) {
        if (Yii::app()->request->isPostRequest) {
            // we only allow deletion via POST request
            $this->loadModel($id)->delete();

            // if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
            if (!isset($_GET['ajax']))
                $this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('manage'));
        }
        else
            throw new CHttpException(400, 'Invalid request. Please do not repeat this request again.');
    }

    /**
     * Lists all models.
     */
    public function actionIndex() {
        $dataProvider = new CActiveDataProvider('Todo', array(
            'criteria' => array(
                'condition' => 'create_user_id=:user',
                'params' => array(':user' => Yii::app()->user->id),
            ),
            'pagination' => array(
                'pageSize' => 20,
            )
        ));

        $this->render('index', array(
            'dataProvider' => $dataProvider,
        ));
    }

    /**
     * returns the current model information.
     */
    public function actionMeta($id) {
        $model = $this->loadModel($id);

        $this->renderPartial('meta', array(
            'model' => $model,
        ), false, true);
    }

    /**
     * Manages all models.
     */
    public function actionManage() {
        $this->layout = '//layouts/default';

        $model = new Todo('search');
        $model->unsetAttributes(); // clear any default values

        if (isset($_GET['tl']))
            $model->todo_list_id = $_GET['tl'];

        if (isset($_GET['Todo']))
            $model->attributes = $_GET['Todo'];

        $this->render('manage', array(
            'model' => $model,
        ));
    }

    /**
     * Set task as done.
     */
    public function actionMarkAsDone($id) {
        $model = $this->loadModel($id);
        $model->complete_date = $model->modify_date = new CDbExpression('NOW()');
        $model->save();

        $this->redirect(array('index'));
    }

    /**
     * Returns the data model based on the primary key given in the GET variable.
     * If the data model is not found, an HTTP exception will be raised.
     * @param integer the ID of the model to be loaded
     */
    public function loadModel($id) {
        $model = Todo::model()->findByPk((int) $id);
        if ($model === null)
            throw new CHttpException(404, 'The requested page does not exist.');
        return $model;
    }

    /**
     * Performs the AJAX validation.
     * @param CModel the model to be validated
     */
    protected function performAjaxValidation($model) {
        if (isset($_POST['ajax']) && $_POST['ajax'] === 'todo-form') {
            echo CActiveForm::validate($model);
            Yii::app()->end();
        }
    }

    /*
     * Retrieves to-do model and output it the data as json. This is used by the calendar view.
     */
    public function actionJsonData() {
        $models = Todo::model()->findAll('create_user_id=:user', array(':user' => Yii::app()->user->id));

        foreach ($models as $model) {
            $data[] = array('id' => $model->id, 'title' => $model->title,
                'start' => $model->start_date, 'end' => $model->due_date, 'allDay' => ($model->allday==1) ? true : false,);
        }

        header('Content-Type: application/json');
        echo json_encode($data);
    }

    /**
     * Switch to calendar view.
     */
    public function actionViewCalendar() {
        $this->layout = '//layouts/default';

        $this->render('calendar', array(
        ));
    }

}
